Phenyl-azo-indole compounds

ABSTRACT

Monoazo dyestuffs which in the form of the free acid correspond to the formula   WHEREIN R1 is alkyl or aryl; R2 is hydrogen or alkyl; R3 is hydrogen, halogen or alkyl; R4 is hydrogen, halogen, alkyl, alkoxy, or nitrile; p or m are 0 or 1 with the sum of the two being 1 or 2; and n is 1 or 2; and A may contain further substituents free of sulfo or sulfato, and their use for the dyeing of natural and synthetic fibre materials, especially for dyeing polyamide fibres. They give level dyeings of good yield with very good fastness to light. They are even absorbed well on polyamide fibres from a neutral to weak acid dye bath. By polyamide fibres there are here especially understood those of synthetic polyamides such as Epsilon -polycaprolactam or condensation products of adipic acid and hexamethylenediamine.

United States Patent [191 Wolfrum et al.

[ PHEN YL-AZO-INDOLE COMPOUNDS [73] Assignee: Bayer Aktiengesellschaft,

Leverkusen-Bayerwerk, Germany [22] Filed: Jan. 26, 1973 [21] Appll No.: 327,109

[44] Published under the Trial Voluntary Protest Program on January 28, 1975 as document no.

[30] Foreign Application Priority Data Jan. 26, 1972 Germany 22034602 [52] US. Cl. .t 260/165; 8/41 B; 260/247.l R;

260/293.73; 260/3l9.l; 260/326.l2 R; 260/326.l3 R; 260/326.l6; 260/332.1; 260/465 E; 260/508; 260/509; 260/518; 260/556 B; 260/397.7; 260/578 [51] Int. Cl. C09B 29/36 [58] Field of Search 260/165, 152

[56] References Cited UNITED STATES PATENTS 1,835393 12/193! Hentrich et al 260/165 3,255,173 6/I966 Dchnerl et a1 260/l65 X 3,6512] 7 4/l972 Hiller et al. 260/165 1 Dec.9, 1975 Primary ExaminerLorraine A. Weinberger Assistant Examiner-C. F. Warren Attorney, Agent, or FirmPlumley & Tyner ABSTRACT Monoazo dyestuffs which in the form of the free acid correspond to the formula wherein R is alkyl or aryl; R is hydrogen or alkyl; R is hydrogen, halogen or alkyl; R is hydrogen, halogen, alkyl, alkoxy, or nitrile; p or m are 0 or 1 with the sum of the two being l or 2; and n is l or 2; and A may contain further substituents free of sulfo or sulfato, and their use for the dyeing of natural and synthetic fibre materials, especially for dyeing polyamide fibres. They give level dyeings of good yield with very good fastness to light. They are even absorbed well on polyamide fibres from a neutral to weak acid dye bath. By polyamide fibres there are here especially understood those of synthetic polyamides such as e-polycaprolactam or condensation products of adipic acid and hexamethylenediamine.

1 Claim, No Drawings PHENYL-AZO-INDOLE COMPOUNDS wherein R alkyl or aryl,

R hydrogen or alkyl,

R hydrogen, halogen or alkyl,

R hydrogen, halogen, alkyl, alkoxy or nitrile,

n l or 2, and I the benzene ring A can contain further substituents free of SO H and OSO H groups, and their manufacture and use for dyeing natural and synthetic fibre materials.

Suitable alkyl groups R R and R are those with 1 8 C atoms, especially unsubstituted C,C,-alkyl radicals such as, for example, CH C,H i- C H, and n-C,H

Suitable alkyl groups R are those with l 8 C atoms, especially C,-C,alkyl radicals which can be further substituted by CN, CONH, or COOH, such as, for example, CH C,H C H,, C4H9, CH- CH CN, ---Cl-l,,Cl-I,CONH and CH,--CH- COOH.

Suitable aryl radicals R are, in particular, phenyl or naphthyl radicals which are optionally substituted further, for example phenyl, naphthyl, p-biphenyl, 4- chlorophenyl, 2,4dichlorophenyl or 4-methylphenyl.

Suitanle halogen atoms are chlorine, bromine and fluorine.

Suitable alkoxy groups are especially those with l 4 C atoms such as, for example, OOCl-l OCJ-l, OC H, and OC,H,,.

The radical of the diazo component A can contain, in addition to the sulphonic acid group which is optionally present in accordance with the definition, further substituents which are free of sulphonic acid groups, for example COOH, halogen, such as chlorine, bromine or fluorine, N0,, alkoxy groups with l 4 C atoms, such as OCH OC,H,, OC H and OC,H,, CN, alkyl groups with l 4 C atoms, such as Cl-h, C,H C H and C,H,, and optionally substituted sulphonamide such as SO,NH,, N-alkyl-, N,N-dialkyl-, N-aryl-, N-aryl-N-alkyl-, N-cycloalkyl-, N-alkyl-N- cycloalkyl-, N,N-dicycloalkyl-, N-aralkyl-, N-aralkyl- N-alkyl-, N-sulpholanyl-(3)-sulphonamide and with the alkyl substituents in the sulphonamide radical preferably possessing l 4 C atoms and being allowed to contain further substituents such as, for example, hydroxyl, chlorine, bromine, nitrile, alkoxy or alkoxycarbonyl. Suitable arylsulphonamides are, for example N-phenylsulphonamides and N-naphthylsulphonamides; amongst N-aralkylsulphonamides there are in particular to be understood N-benzylsulphonamides and N-phenethylsulphonamid'es and by N-cycloalkylsulphonamides there are in particular to be understood Ncyclohexylsulphonamides and N-cyclopentylsulphonamides. The aryl, aralkyl and cycloalkyl radicals can also possess further non-ionic substituents such as, for example, C,C,-alkyl groups or halogen, such as chlorine or bromine.

Preferred dyestuffs within the framework of the formula (l) are those which in the form of the free acid correspond to the formula N: R; (a, z

(er, i

wherein R R R R and n have the abovementioned meaning,

R represents halogen or alkyl and 1 represents 0, I or 2.

Particularly preferred dyestuffs are those of the for mula R, represents hydrogen or C C, alkyl which is optionally substituted by CN, CONH,

COOH, especially those of the formula a, so,n V) (a n Q wherein R R,', R, and z have the abovementioned meaning and R, represents chlorine or bromine. Particularly preferred dyestuffs within the framework of the formula (III) are those of the formula no, sn=n m i, a,

wherein R R R R and have the abovementioned meaning.

The radicals R, or R, can here be identical or differ- 5 ent.

Further preferred dyestuffs of the general formula (I) are those in the form of the free acid correspond to the formula R R R and n have the aforementioned meaning,

R represents a non-ionic substituent and 2: represents the numbers 0, l or 2.

Particularly preferred dyestuffs are those of the formula so, a t.

Qua-w 41,

(cr a,

wherein R R R and n have the aforementioned meaning and y represents the numbers 1 or 2, especially those of the formula so, a

(VII tn,

Jl=n- R1 or, a,

wherein R R and y have the aforementioned meaning and R represents chlorine, bromine or an optionally substituted sulphonamide group. The substituents R and R can here be identical or different.

The new dyestuffs of the formula (l) are obtained by diazotising amines of the general formula (VIII) 4 wherein A, n and p have the meaning mentioned in the formula (I) and combining them with a coupling component of the formula 3 m IX) wherein R R and m have the meaning mentioned in the formula (I).

Examples of suitable amines of the formula (Vlll) are: 0-, mand p-trifluoromethyl-aniline, 2-methyl-4- trifluoromethylaniline, 3-methyl-4-trifluoromethyl-aniline, 4-methyl-Z-trifluoromethyl-aniline, 2-trifluoromethyl-4-chloro aniline, 2-trifluoromethyl-4- bromo-aniline, 3-trifluoromethyl-4-fluoro-aniline, 2,6- dichloro-4-trifluoromethyl-aniline, Z-trifluoromethyl- 4-nitro-aniline, 3-trifluoromethyl-4-methoxy-aniline, 4-trifluoromethyl-5-chloro-aniline, 2,3,5,6-tetrachloro- 4-trifluoromethylaniline, 2-trifluoromethyl-5-nitro-aniline, 3-trifluoromethyl-6-bromo-aniline, 2,6-dinitro 4- trifluoromethyl-aniline, 2-cyano-4-trifluoromethyl-aniline, 2-nitro-4-trifluoromethyl-aniline, 2-cyano-6-nitro- 4-trifluoromethyl-aniline, Z-trifluoromethyl--chloroaniline, 3-trifluoromethyl-4-bromo-aniline, 2,5- dichloro-4-trifluoromethyl-aniline, 2-trifluoromethyl- 5-chloro-aniline, 3-trifluoromethyl-fi-chloro-aniline, 2-chloro-3-trifluoromethylaniline, 3-chloro-2-trifluoromethyl-aniline, 2-trifluoromethyl-4-fluoro-aniline, 2,4-bis-(trifluoromethyl)-aniline, 2,5-bis-(trifluoromethyl)-aniline, 2,6-bis-(trifluoromethyl)-aniline, 2-nitro-4,6-bis-(trifluoromethyl)-aniline, 4-nitro- 2,6-bis-(trifluorome thyl)-aniline, Z-chIoro-S-trifluoromethyl-aniline-4-sulphonic acid, 4-trifluoromethyl-aniline-2-sulphonic acid, 2,4-dichloro'5- trifluoromethyl-aniline-fi-sulphonic acid, 2,5-dichloro- 3-trifluoromethyl-aniline-4-sulphonic acid, 3-trifluoromethyl-aniline-4-sulphonic acid, 2-bromo-5 -trifluoromethylaniline-4'sulphonic acid, Ltrifluoromethyl-4-chloro-aniline-fi-sulphonic acid, Z-methoxy-S-trifluoromethyl-aniline-4-sulphonic acid, Z-trifluoromethyl-aniline-4-sulphonic acid, Z-methyl-S-trifluoromethyl-aniline-4-sulphonic acid, and the sulphonamides, N-alkyl-, N,N-dialkyl-, N-aryl-, N-alkyl- N-aryl-, N-cycloalkyl-, N,N-dicycloalkyl-, N-aralkyl-N- alkyl-, N,N-diaralkyl-, N-pentamethylene-, and N-sulpholanyl-(3)-sulphonamides which are derived from the abovementioned sulphonic acids.

These sulphonamides are obtained in accordance with methods known from the literature, for example by reacting the appropriately substituted N-acylated aniIine-sulphochlorides with amines and subsequently splitting off the acyl group or reacting the appropriately substituted nitrobenzene-sulphochlorides with amines and subsequently reducing the nitro group to the amino group.

Examples of suitable coupling components are: 2 methylindole, Z-phenyl-indole, l-methyl-Z-phenylindole, l,2-dimethyl-indole, l-B-cyanoethyl-Z-methylindole, l-B-cyanoethyl-2-phenyl-indole. B-(Z-phenylindolyl-l)-propionic acid amide, B-(Z-methyl-indolyll)-propionic acid amide, l-(y-aminopropyl-Z-phenylindole, B-(Z-methyl-indolyl-l )-propionic acid, 2-B- naphthyl-indole, 2-p-diphenylyl-indole, 2,5-dimethylindole, 2,4-dimethyl-7-methoxy-indole, 2-phenyl-5- ethoxy-indole, 2-methyl-5-ethoxy-indole, 2-methyl-5- chloroindole, 2-methyl6-chloro-indole, 2-methyl-5- nitro-indole, 2-methyl-5-cyan0-indole, 2-methyl-7- chloro-indole, 2-methyl-5-fluoro-indole, 2-methyl-5- bromo-indole, 2-methyl-5,7-dichloro-indole and 1-8- cyanoethyl-2,6-dimethyl-indole and also the indole-sulphonic acid described in German Patent Specification No. 137,117 and other indole-sulphonic acids manufactured analogously to the process described in German Patent Specification No. 137,117 from 2-alkylindoles or 2-aryl-indoles, for example 2-methyl-indolesulphonic acid, l,2-dimethyl-indole-sulphonic acid, 2,5-dimethyl-indole-sulphonic acid, l-ethyl-2 methylindole-sulphonic acid, l,2,S-trimethyl-indole-sulphonic acid, 1 -ethyl-2,5-dimethylindole-sulphonic acid, 2- phenyl-indole-sulphonic acid, l-methyl-Z-phenylindole-sulphonic acid and B-[(2-phenyl-5sulphoindolyl-(l)]-propionic acid amide. lt is probable that at least in the case of the indoles which are unsubstituted in the carbocyclic part the sulpho group enters in the 5position during the sulphonation in accordance with the processes described in German Patent Specification No. 137,117.

The dyestuffs according to the invention are suitable for dyeing natural and synthetic fibre materials, especially for dyeing polyamide fibres. They give level yellow to orange dyeings of good yield and very good fastness to light. They are even absorbed well on polyamide fibres from a neutral to weak acid dye bath. By polyamide fibres there are here especially understood those of synthetic polyamides such as e-polycaprolactam or condensation products of adipic acid and hexamethylenediamine. The dyestuffs are here employed in the form of the free acid or in the form of their salts, especially of the alkali metal salts such as the sodium or potassium salts, or the ammonium salts. The formulae given above are those of the free acids.

EXAMPLE 1 4.25 g of 2-trifluoromethyl-4-chloro-aniline are diazotised in dilute hydrochloric acid, at 0C, with l6 g of a l0 percent strength sodium nitrite solution. After the excess nitrite has been removed with amidosul phonic acid, the solution of the diazonium salt is combined with a solution of 4.75 g of Z-methylindole-sulphonic acid in water and the mixture is buffered slightly with sodium acetate. After completion of coupling the dyestuff, which in the form of the free acid corresponds to the formula is isolated. The dyestuff dyes polyamide from a weakly acid or neutral bath in greenish-tinged yellow shades of very good fastness to light.

EXAMPLE 2 3.5 g of Z-trifluoromethyl-aniline-4-sulphonic acid are diazotised in dilute hydrochloric acid with 10 g of a l0 percent strength sodium nitrite solution. The solution of the diazonium compound is combined with a solution of 2.0 g of Z-methyl-indole in glacial acetic acid. The mixture is buffered slightly with sodium acetate and the dyestuff, which in the form of the free acid corresponds to the formula H0 s N=N H is isolated by filtration. The dyestuff dyes polyamide, from a weakly acid or neutral bath, in greenish-tinged yellow shades of very good fastness to light.

DYEING EXAMPLE ().l g of the dyestuff from Example 1 is dissolved in I00 ml of hot water, 5 ml of 10 percent strength ammonium acetate solution are added and the mixture is diluted to a volume of 500 ml with water. l0 g of polyamide fibre are introduced into the dye bath, which is brought to the boil over the course of 20 minutes, 4 ml of 10 percent strength acetic acid are added and the bath is kept at the boil for one hour. Thereafter the material is rinsed and dried at -80C. A dyeing in a greenish-tinged yellow shade of very good fastness to light and to wet processing is obtained.

If the procedure in Example I or in Example 2 is followed the diazo components employed are the compounds listed in Column l of the table which follows and the coupling components employed are the compounds listed in Column [1 of the table which follows, valuable water-soluble dyestuffs, which dye polyamide from a weakly acid or neutral bath in yellow to orange 5 light-fast shades, are again obtained.

Example Diazo component Coupling component 3 C\J :ITNH2 Z-phenyl-indole-sulphonic acid a 1,Z-dimethyl-indole-sulphonic acid 5 l-methyl-2-pheny1-indole-su1phonic acid 6 1,2,S-trimethyl-indole-sulphonic acid Example Diazo component Twig? V 7 M Q B NH 10 Q 2 k 1 16 in Continued Coupling com onent Z-methyl-indole-sulphonic acid Z-phenyl-indole-sulphonic acid 1-ethy1-2-methy1-indole-sulphonic acid 2methyl-indole-sulphonic acid Z-ethyl-indole-sulphonic acid 2-pheny1-indo1e-sulphonic acid 2methyl-indole-sulphonic acid l,Z-dimethyl-indole-sulphonic acid 2-methy1indole-sulphonic acid Z-phenyl-indole-sulphonic acid Z-phenyl-indolesulph0nic acid l,Z-dimethyl-indcle-sulphonic acid l-mechyl-2-phenyl-indo1e-sulphonic acid Z-methyl-indole-sulphonic acid 1,2,5-trimethy1-indole-sulphonic acid Z-methyl-indole-sulphonic acid Z-phenyl-indole-sulphonic acid l-methyl-Z-phenyl-indole-sulphonic acid Z-methyl-indole-sulphonic acid Examgle Diazo co ngonent B r 27 G -1-m-so Qua,

c 1 28 @mi-so Nu,

29 (on N-so, -NH,

0-": S L m O- s m cw, s 39 O2 ONH 0' SGNH.

o 5 a c l-0.5g,

(C2 H5 )2 N450: Q 1, 2-dime'bhyl-indole-sulphonic acid Z-methyl-indole-sulphonic acid Z-phenyl-indole-sulphonic acid l-ethyl-Z-methyl-indole-sulphonic acid 2-methyl-indo1e-sulphonic acid 2-phenyl-indole-sulphonic acid l-methyl-Z-phenyl-indole-sulphonic acid 2methyl-indo1e-sulphonic acid Z-phenyl-indole-sulphonic acid l-methyl-Z-phenyl-indole-sulphonic acid Z-methyl-indole-sulphbnic acid Z-phenyl-indole-aulphonic acid l-methyl-Z-phenyl-indole-sulphonic acid Z-methyl-indole-sulphonic acid Z-phenyl-indole-sulphonic acid l-methyl-Z-phenyl-indole-sulphonic acid 2-methy1-indole-sulphonic acid Z-phenyl-indole-sulphonic acid l-methyl-Z-phenyl-indole-sulphonic acid Example Dia zo cogponent F, GHQ-NH:

so, nil-Q Continued Cougligg coggonent Z-methyl-indole-sulphonid acid Z-phenyl-indole-sulphonic acid l-me'thyl-2-pheny1-indole-sulphonic acid l,2,5-trimethyl-indo1e-sulphonic acid l-ethyl-Z-methyl-indole-sulphonic acid l-ethyl-Z,5-dimethyl-indolesulphonic acid 1,Z-dimethyl-indole-sulphonic acid Z-methyl-indole-sulphonic acid 2-pheny1-indo1e-sulphonic acid l-methyl-2-pheny1-indole-sulphonic acid l,2-dimethyl-indole-sulphonic acid 1,2,5-trimethyl-indole-sulphonic acid l-ethyl-Z-methyl-indole-sulphonic acid 2-phenyl-indo1e-sulphonic acid l-methyl-2-phenyl-indole-sulphonic acid Z-methyl-indole-sulphonic acid Z-phenyl-indole-sulphonic acid 1-me-thyl-2-phenyl-indole-sulphonic acid 2-methyl-indole-sulphonic acid Z-phenyl-indole-sulphonic acid Example on inued Diazo comgonent F c-Q-"E so NHQ- 1 F, c-Q-Na,

so, BIB-61 F, c-Q-rm,

(0,11, No, s m,

l tiiyl-2 hZ11-1ndo1e-sul honic acid Z-methyl-indcle-sulphonic acid Z-phenyl-indo1e-sulphonic acid l-methyl-Z-phenyl-indole-sulphonic acid Z-methyl-indolesu1phonic acid Z-phenyl-indolesu1phonic acid l-methyl-Z-phenyl-indolesu1phonic acid Z-methyl-indole-sulphonic acid Z-methyl-indole-sulphonic acid 2-phenyl-indo1e-sulphonic acid l-methyl-Z-phenyl-indole-sulphonic acid 2-methy1-indole-sulphonic acid 2-pheny1-indo1e-su1phonic acid l-methyl-Z-phenyl-indole-sulphonic acid Z-methyl-indole-sulphonic acid 2-pheny1-indole-sulphonic acid l-methyl-Z-phenyl-indole-sulphonic acid Z-methyl-indole-su1phonic acid -Cqntinued Example Diago component Coupling component 87 A w 7 zhen i-indol ilbhonic acid 88 l-methyl2-phenyl-indole-sulphonic acid ua-o, s-Q- 89 CF Z-methyl-indole-sulphonic acid 9O 2-phenyl-indole-sulphonic acid 91 1methyl-Z-phenyl-indole-sulphohic acid 92 Z-methyl-indole-sulphonic acid 93 2-phenyl-indole-sulphonic acid 94 l-methyl-Z-phenyl-indole-sulphonic acid @rm-o, s-Q-h 95 CF Z-methyl-indole-sulphonic acid 96 2-phenyl-indole-sulphonic acid 9'7 l-methyl-Z-phenyl-indole-sulphonic g-Nik SQ-NHG @OQW acid

Z-methyl-indole-sulphonic acid 2-pheny1-indole-su1phonic acid 1-methy1-2-pheny1-indo1e-sulphonic acid Z-methyl-indole-sulphonic acid Z-phenyl-indole-sulphonic acid l-methyl-Z-phenyl-indole-sulphonic acid Z-methyl-indolesulphonic acid 2-pheny1-indole-sulphonic acid 1-methyl-2-phenyl-indole-sulphonic acid Z-methyl-indole-sulphonic acid Continued Phcam 1e Diazo com onent Ccu Li co onent 108 Z-phenyl-indole-sulphonic acid 109 l-methyl-Z-phenyl-indole-sulphonic acid 110 '9 2-methy1-indo1e-sulphonic acid 111 2-pheny1-indole-sulphonic acid 112 lme'thy1-2-pheny1-indole-sulphonic acid 115 Z-methyl-indcle-sulphonic acid 0, a, CF,

11 2-pheny1-indole-sulphonic acid 115 l-methyl-2-pheny1-indole-sulphonic acid 116 CI-CH' Q Z-methyl-indole-sulphonic acid 117 Z-phenyl-indole-sulphonic acid 118 l-methyl-2-pheny1-indole-sulphonic acid 119 no, s-drm, 2-pheny1-indo1e 120 l-methyl-Z-phenyl-indole 121 l,2-dimethy1indo1e 122 1-B-cyanoethyl-Z-methyl-indole 123 1-B-cyanoethyl-Z-phenyl-indole cr, 12A 80, 50. B--[ 2-pheny1-indo1y1-(1)] -propionic acid amide 125 2-B-naphthy1indo1e 126 2-p-diphenyly1-indo1e 127 1,2,5-trimethy1indcle 128 l-ethyl-Z-methylindole 129 2-methy1-6-chloro-indo1e 130 2-methy1-7-ch1oro-indo1e 131 2-methyl-5,7-dich1cro-indole Example 1&9

Continued Diazo component COLIW l-B-cyanoethyL-Z, dimethylindole Z-methyl-S-mechoxy-indole 2-met1 1yl-5-br'omo-indole Z-methyl-S-fluoro-indole Z-methyl-indole 2-phenyl-indol I l-methyl-Z-phenyl-indole 1,2-dimethy1-indo1e 1-5cyanoethyl-2-methy1-indole 1-6 -cyanoethyl-Z-phenyl-indole p-[2-phenylindo1y1( -P pionic acid ami e Z-B-naphthyl-indole Z-p-diphenylyl-indole 1,2,5-trimethyl-indole l-ethyl-Z-methyl-indole 2-me'thy1-6-ch1arc-indole H 2-methyl-7-chloro-indo1e 2-methyl-5,7-dichloro-indole lcyanoethy1-2,6-dimethy1 in ole 2-methyl 5-methoxy-indole 2-methyl-5-bromo-indo1e Z-methyl-5-fluoro-indole 2-methyl-indo1e 3-[2-pheny1-indo1yl-(l) ]-propionic acid amide Continued Example Diazo c a pcment Coupling componegL 161 2-5-nephthyl-indo1e 162 Z-p-diphenylyl-indole 163 1,2,5-trimethy1-indole 16h 1-ethy1-2-methyl-indo1e 165 1-n-buty1-Z-methyl-indole 166 2-methy1-6-chloro-indo1e 167 2-methy1-7-chloro-indole 168 2-methy1-5,7-dichloro-indole 169 l-B-cyanoethyl-Z,-dimethyl-indole 170 2-methy1-5-methoxy-indo1e 171 2-methy1-5-bromo-indole 1?; H /Q MH Z-methyl-S-fluoro-indole or, 175 2-methy1-indole 01 Q0, 17 2-pheny1-indole 175 l-methyl-Z-phenyl-indole 176 l-Bcya.noethy1-Z-methyl-indole 1'77 l-e'thyl-Z-phenyl-indule 178 1,2,5-trimethy1-indo1e 179 2-methy1-6-chloro-indo1e 180 l-g-cyanoethyl-Z,6-dimethy1indo1e 181 5 -NH 2-methy1-indo1e 182 2-pheny1-indole 183 l-methyl-Z-phenyl-indole 18 l-p-cyanoethy1-2-methylindole 185 1-6cyanoethy1-2-pheny1-indole 186 2-methyl-5-methoxy-indole 187 2-methy1-6-ch1oro-indole Br 188 'Q' 2-methylindo1e 189 Z-phenyl-indole 190 l-methyl-Z-phenyl-indole Continued Example Diazo comgonent Coupliry; colgponent 191 l-fi -cyanoethy12-methy1indole 192 l-B -cyanoethy12-phenyl-indole 93 2-methy1-5-methoxy-indo1e B1 19h H0 S NH 2-methy1-6-ch1oro-indo1e 195 HO: Q Z-methyl-indole 196 2-pheny1-indo1e 197 1-methy1-2-pheny1-indole 198 1- B-cyanoethyl-Z-methyl-indole 199 1- Q-cyanoethyl-Z-phenyl-indole 200 2-methyl-5methox'y-indole 201 Z-methyl-G-chloro-indole 202 1,2-dimethy1-indole 203 1,2,5-trimethy1-indole c F, 20h H0, 5 NH, Z-methyl-indole 205 2-phenyl-ind0le 206 lmethy1-2phenyl-indo1e 207 1,2-dimethyl-indole 208 1,2,5-trimethy1-:Lndo1e 209 1-B-cyanoethyl-Z-methyl-indole 210 1-B-cyanoethyl-2-pheny1indo1e 211 B-[2-phenyl-indo1y1-(l) ]propionic acid amide cr, 212 no, 5.6.11 Z-methyl-indole-sulphonic acid 213 Z-phenyl-indole-sulphonic acid 21h 1-methy1-2-phenyl-indole-sulphonic so, a

acid

Z-methylindo1e-su1phonic acid 2-phenyl-indole-sulphcnic acid lmethy1-2phenyl-indole-sulphonic l,2,5-trimethy1-indole-sulphonic 1,S-dimethyl-2-phenyl-indole- Z-methyl-indole-sulphonic acid Z-phenyl-indole-sulphonic acid l-methyl-2-phenyl-indole- 1, 2-dimethyl-5-chloro-indolel,2,S-tr'imethyl-indole-sulphonic l-ethyl-Z-methyl-indole-sulphonic 2-methyl-indole-sulphonic acid l-methyl-Z-phenyl-indole-sulphonic 2-phenyl-indole-sulphonic acid 2-methy1-indo1e-sulphonic acid l-methyl-Z-phenyl-indo1e-sulphonic Z-me'thyl-indole-sulphonic acid 2pheny1indo1e-sulphonic acid Continued Example Diazo component acid acid

sulphonic acid 0 ..-N'F|I 221 sulphonic acid sulphonic acid acid 01-", 226 -{qoa 6 acid acid CF 231 @N-SO NH 2 acid CH C 1 3 H0, S-3-NH Z-methyl-indole 35 2-phenyl-indo1e l-methyl-Z-phenyl-indole -Cminued Example Diago cogponent Cougling coggonent 257 2 S-dimethyl-indole COOH 238 g Z-methyl-indole-sulphonic acid 239 2-pheny1-indole-su1phonic acid 2 +O l-methyl-Z-phenyl-indole-sulphonic acid We claim: wherein l. Dyestuff of the formula R is hydrogen, methyl, methoxy, chloro or bromo;

R is C,--C alkyl or phenyl;

50 R R is hydrogen, C,C alkyl or C C -alkyl substituted by cyano, carbonamido, or carboxy. 

1. DYESTUFF OF THE FORMULA 